<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    div {
      width: 200px;
      height: 200px;
      background-color: red;
    }

    p {
      width: 100px;
      height: 100px;
      background-color: skyblue;
    }

    ul {
      width: 300px;
      height: 300px;
      background-color: pink;
    }

    li {
      width: 50px;
      height: 50px;
      background-color: skyblue;
    }
  </style>
</head>
<body>

  <!-- <div>

    <p>1</p>

    <p data-click-p-abc="handler" >2</p>

    <span data-click-span-bcd="handler2">3</span>

  </div> -->

  <!-- <button>添加一个 li</button>

  <ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
  </ul> -->

  <script src="./index.js"></script>
</body>
</html>
